地铁基坑地下连续墙渗漏原因分析及治理措施
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摘要
通过统计研究苏州地铁11座车站372幅地下连续墙的渗漏情况,分析导致地下连续墙渗漏的影响因素包括:场地工程地质、支护结构施工质量、施工现场复杂环境等,处理渗漏事故须遵循"疏导为主,疏导、封堵、加固相结合"的原则,针对不同情况,可采用坑后注浆封堵、降压井降低承压水水压、减少周围环境荷载对基坑的影响、改进工艺等措施。
The datum of seepage accidents of 372 diaphragm walls in 11 subway stations on the diaphragm walls had been investigated and analyzed by statistical method. the influences factors that the seepage accidents occurred on diaphragm walls had been analyzed systematically: engineering geology and hydrogeology condition, construction quality effect of supporting wall, complicated environment factors at construction field, and so on. The principle including of primary persuasion, combination of the persuasion, plugging and reinforcement must be abided when facing the seepage accidents, therefore,the different preventing and handling measures had been given according to different seepage condition,such as slip casting behind the diaphragm wall, reducing the hydraulic pressure of confined water through the dewatering well, reducing the environment load influence on the excavation, improving the construction technology and promoting the quality.
The datum of seepage accidents of 372 diaphragm walls in 11 subway stations on the diaphragm walls had been investigated and analyzed by statistical method. the influences factors that the seepage accidents occurred on diaphragm walls had been analyzed systematically: engineering geology and hydrogeology condition, construction quality effect of supporting wall, complicated environment factors at construction field, and so on. The principle including of primary persuasion, combination of the persuasion, plugging and reinforcement must be abided when facing the seepage accidents, therefore,the different preventing and handling measures had been given according to different seepage condition,such as slip casting behind the diaphragm wall, reducing the hydraulic pressure of confined water through the dewatering well, reducing the environment load influence on the excavation, improving the construction technology and promoting the quality.
引文
[1]中华人民共和国建设部.地铁及地下工程建设风险管理指南[M].北京:中国建筑工业出版社,2007.
[2]侯新宇.复杂地铁基坑地下连续墙支护结构变形特征及其风险分析[D].南京:东南大学,2012.
[3]赵云非,王晓琳.城市地铁深基坑施工渗漏水原因分析与预防[J].隧道建设,2013,33(3):242-246.
[4]卢一凡,张胜军,李青,等.落底式地连墙墙角漏水的原因与对策[J].建筑技术,2016,47(2):178-181.
[2]侯新宇.复杂地铁基坑地下连续墙支护结构变形特征及其风险分析[D].南京:东南大学,2012.
[3]赵云非,王晓琳.城市地铁深基坑施工渗漏水原因分析与预防[J].隧道建设,2013,33(3):242-246.
[4]卢一凡,张胜军,李青,等.落底式地连墙墙角漏水的原因与对策[J].建筑技术,2016,47(2):178-181.